228 research outputs found
Conformal Higgs Inflation
We investigate a locally scale-invariant (that is, Weyl-invariant) theory
which describes the coupling of gravity and the standard model from the
viewpont of the Higgs mechanism and inflation. It is shown that this theory
exhibits a peculiar feature of a coupling between the gauge field and the
inflaton in a large field limit whereas it nicely describes the standard model
coupled to general relativity in a small field limit. Moreover, we discuss a
possibility that this Weyl invariant theory could explain the recent BICEP2
measurement by deforming the potential term in an appropriate way, and find it
to be difficult to do that even if we introduce a non-analytical type of the
potential.Comment: 13 page
Quadratic Chaotic Inflation from Higgs Inflation
Stimulated with the recent discovery of B-mode by BICEP2, we discuss the
relation between a Higgs inflation and a chaotic inflation with quadratic
potential. Starting with a generalized Higgs inflation model, we derive a
condition for obtaining the quadratic chaotic inflation. It is shown that the
running of the Higgs self-coupling constant in the Jordan frame plays a
decisive role when the generalized Higgs inflation model coincides with the
Higgs inflation model in a small-field limit.Comment: Added some sentences to the final section for clarificatio
Non-ladder Extended Renormalization Group Analysis of the Dynamical Chiral Symmetry Breaking
The order parameters of dynamical chiral symmetry breaking in QCD, the
dynamical mass of quarks and the chiral condensates, are evaluated by
numerically solving the Non-Perturbative Renormalization Group (NPRG)
equations. We employ an approximation scheme beyond ``the ladder'', that is,
beyond the (improved) ladder Schwinger-Dyson equations. The chiral condensates
are enhanced compared with the ladder ones, which is phenomenologically
favorable. The gauge dependence of the order parameters is fairly reduced in
this scheme.Comment: 18 pages, 30 eps file, 15 figures, LaTeX, slightly revised,
references corrected, To be published in Prog. Theo. Phy
Wilson Renormalization Group Equations for the Critical Dynamics of Chiral Symmetry
The critical dynamics of the chiral symmetry breaking induced by gauge
interaction is examined in the Wilson renormalization group framework in
comparison with the Schwinger-Dyson approach. We derive the beta functions for
the four-fermi couplings in the sharp cutoff renormalzation group scheme, from
which the critical couplings and the anomalous dimensions of the fermion
composite operators near criticality are immediately obtained. It is also shown
that the beta functions lead to the same critical behavior found by solving the
so-called ladder Schwinger-Dyson equation, if we restrict the radiative
corrections to a certain limited type.Comment: 13 pages, 7 epsf figure
Classification on the Web: an analysis of Dewey Linked Data
With the availability of information in the World Wide Web its access and retrieval by the users is facilitated, and the Libraryand Information Science (LIS) field’s knowledge and techniques can be applied to this environment in order to help with theprocess. e present study is descriptive, qualitative and exploratory, based on bibliographical sources, in which it was exploredhow the Classification discipline interacts with Linked Data, focusing on the analysis of Dewey Linked Data. From four catalogsanalyzed, referred to in the literature as adhering to Dewey Linked Data, only two actually has links in their records redirectingto the system. Despite this, its presence in e Linked Open Data Cloud appears as a positive factor in its dissemination, since itboosts its visibility. It is concluded that the Classification discipline allows the thematic standardization of information resources,so that there is uniformity in the Web environment and quality retrieval of information, while promoting interoperability betweendata in the Linked Data context. e standardization of metadata values using classifications optimizes the representation ofinformation and its retrieval in the Web, while also providing the reuse of data. In addition, studies that align the area of Library andInformation Science with the Semantic Web and its technologies can provide new perspectives for the area, as well as contemplatethe users’ always changing needs, thus, fulfilling the objective of the field
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